Here's the infographic version of the research that's linked in the article: <a href="http://vetoviolence.cdc.gov/apps/phl/resource_center_infographic.html" rel="nofollow">http://vetoviolence.cdc.gov/apps/phl/resource_center_infogra...</a>. Even one adverse experience increases the chance of drug use, depression, alcoholism and suicide attempts by over 50%. Almost two thirds of participants (drawn from a cross-section of middle-class Americans) reported at least one such experience.